Telegraph transmitter



1954 E. A. GUBISCH 2,691,062

TELEGRAPH TRANSMITTER 23, 1951 2 Sheets-Sheet l INVENTOR ERWIN A. GUBIS CH ATTORNEY 06L 1954 E. A. GUBISCH TELEGRAPH TRANSMITTER 2 Sheets-Sheet 2 Filed Oct. 25, 1951 FIG. 3

FIG.5

INVENTOR ERWIN A. GUBISCH ATTORNEY Patented Oct. 5, 1954 NITED TELEGRAPH TRANSMITTER Erwin A. Gubisch, Chicago, 111., assignor to Teletype Corporation, Chicago, 111., a corporation of Delaware Application October 23, 1951, Serial No. 252,678

'7 Claims.

This invention relates to telegraph transmitters and more particularly to cam type transmitte s.

The principal object of the invention is to provide a simple, compact and efficient transmitting apparatus, whereby very accurate timing 'of telegraph signals is assured.

Another object of the invention is to provide in a transmitter, .a flutter cam arrangement for obtaining a more accurate operation of the trans initting contact mechanism.

Specifically, the transmitting portion of the arrangement according to the present invention, embodies a signal generator comprising a cam drum having a series of cam projections arranged helically to effect through a corresponding series of interponents the conditioning of a rockable member, and a vibrating means comprising a flutter cam device for activating the transmitter contact according to the condition of said rockable member.

The foregoing and other objects of the inven tion will be more apparent in the following detailed description of the invention when taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a fragmental plan view of the keyboard transmitter showing the signal generator according to the present invention;

Fig. 2 is a front elevational View, partly in section, of the signal generator shown in Fig. 1;

Fig. 3 is a rear elevational view of the signal generator taken on line 33 of Fig. 1;

Figs. 4 and 5 represent different conditions of operation of the mechanism shown in Fig. 3', and Fig. 6 is a plan view of the contact assembly.

In the embodiment of the invention to be described hereinafter, the details of the telegraph transmitter which cooperate with the apparatus of the present invention, but which do not constitute a part of the combination comprising the invention have not been shown in the drawing and will not be described herein since they are shown and described in great detail in the copending application Serial No. 95,964, filed May 28, 1949, by W. J. Zenner, now Patent No. 2,607,848 issued August 19, 1952, which disclosure is incorporated herein by reference, and made a part hereof.

Briefly, the present apparatus embodies primarily a base portion which is provided at its forward portion with a keyboard (not shown) of usual form, and which is adapted to house the key levers H (shown in section), Figs. 1 and 2, and the selector mechanism l2 operated thereby.

Mounted on the base are the power drive means 43, signal generator l4 and related parts which are selectively controlled by the aforementioned selector mechanism I 2. A motor I 5 (Fig.1) for supplying the power for operating the keyboard transmitter is appropriately mounted on the base portion in position to effect the rotation of a single operating shaft It.

Having reference to Figs. 1 and 2, the key levers control the setting of code bars !2 permutably. As set forth in said patent, the code bars [2 are normally biased rightwardly (as viewed in Fig. 2) by individual springs (not shown), but are held in their leftward position by a bail member i;

which bears against shouldered portions IE on said code bars l2. Bail member H is mounted pivotally on a suitably journalled shaft l9, and is normally urged in a, counterclockwise direction (as viewed in Fig. 2) by a spring 2|. However, bail l l is normally restrained against said counterclockwise movement by a key Controlled tripoif means (not shown) of a nature substantially as disclosed in said patent. Carried on bail H is a stud 22 at the extremity of which is fixed a blade 23 which cooperates with a reset arm 24 of the follower plate of a reset cam 25 of the eccentric cam type carried on shaft is. Ann 24 is normally held in cooperative relation with the blade 23 by a spring 26.

As more fully described in said patent, the clutch I3 is of the single revolution type, and is normally locked against rotation by a release lever (not shown) controlled by a universal bar 27 (Fig. 1) upon the actuation of a key lever I I. Each of the code bars I2 is provided on its upper edge with a notch 30 which cooperates with the lower arm of a transfer lever 28. Levers 28 are mounted pivotally on a pivot rod 29 suitably supported in a bracket 3!, and are normally biased counterclockwise by individual springs 32. Levers 28 are normally held in their clockwise position against the action of springs 32 (as shown in Fig. 2) by the notch 3.9 of code bars #2, and when the code bars !2 are permitted to move rightwardly the associated levers 28 are permitted to rot te counterclockwise a predetermined amount under the action of their individual springs 32. Levers 28 are guided by the upper and lower flanges of bracket 3 l.

Pivotally articulated to the upper arm of each of the levers 28, and also guided in the bracket 31, is an interponent member 33. Each interponent 33 is adapted to cooperate with an individual cam 3d carried on shaft It. The apices of cams 34 are arranged helically, in well known manner, to effect sequential operation of the interponents. Each interponent 93 is also provided with a pair of markin and spacing abutments 35 and 36, respectively, adapted to cooperate under predetermined conditions with depending flanges or abutments 3'! and 38 of a rocker member 39 mounted pivotally on a pivot shaft il.

The cam projections or apices of cams 39, as previously mentioned, are arranged helically, in well known manner, so that upon rotation of said cams, the interponents 33 will be oscillated sequentially. Thus, if a code bar 12 has not been permitted to move rightwardly, Fig. 2 (because its ward $2 has been blocked by an operated selector level ll), its associated interponent 33 will remain in the position shown in Fig. 2, with the abutment 35 in register with the flange 37 of th rocker member 39. Then, when the cams 39 are rotated, the interponent 33 associated with its respective cam, will, in predetermined timed relation with the speed of transmission, be actuated clockwise against the pull of its individual spring 43 so that the abutment 35 thereon will strike or abut the flange 3'! (if the rocker member 89 was in its counterclockwise position) to rotate the rocker member clockwise. On the other hand, if a code bar i2 has been permitted to move rightwardly, its associated interponent 93 will be actuated toward the left (Fig. 2) to bring the abutment 36 in register with the flange 38 of the rocker member 39. Therefore, when the cam 34 is rotated, the interponent 33 associated there- 'with will be actuated clockwise, as before, but

now the abutment 3 5 will abut the flange 38 to rotate the rocker 39 counterclockwise. The effect of this rocking motion upon the operation of the transmitting contacts will appear hereinafter.

Associated with the series of cams 34 is a cam 4 3 which cooperates with the extremity of arm 45 of a locking bail member 49 mounted on a pivot 41. Bail 45 is provided with a blade 58 which cooperates with the pointed upper extremities d9 of levers 28. Rightward and, leftward reciprocating movements of the interponents 53 are controlled by a limiting stop 5| operable between shoulders 53 and 59 on the interponents 33, whereby the relative movement between abutments 35 and 39 and the flanges 31 and 38, respectively, is governed. Normal clockwise bias is imparted to bail 46 by a spring 55. Integral with the rocker member 39 is an arm 55 which is adapted to cooperate with a rocker detent 5? carried on pivot 58. Spring 55 being distended between bail 96 and detent 5'! also serves to bias the detent 52 in a counterclockwise direction.

Fixed to the rocker member 39 and rockable therewith is a rocker extension 59, through which the rocker member 39 cooperates with the flutter cam arrangement shown in Figs. 3, 4, and 5. The transmitting contact assembly is located in a suitable housing 6| mc unted in the signal generator l4 above the rocker member 39 and appropriately spaced therefrom. The flutter cam assembly functions through a contact operating lever 62, which is connected pivotally to the stem of a T-shaped lever 63 (Fig. 6). Each of the arms of the T-lever 63 is provided on its underside with a contact point 64 which cooperates respectively with fixed contact points 65 carried on bracket E6. At a point centrally located between the contacts 6 3, the swingable T-lever 63 is provided with a V-shaped notch 67 which cooperates with an arm of a substantially U-shaped member 58, the

other arm of which cooperates with a V-shaped notch 69 in a bracket 1| mounted in the housing 6|. A spring 12 having one end attached to the member 68 has the other end attached to a spring post 73.

The spring 12 is thus so connected that the member 68 will be urged normally in a clockwise direction (Fig. 6), urging the contact points 64 toward their associated contact points 65. With the notch 61 centrally located, a balanced pressure is exerted with respect to both of the contact points 69. In actual practice the operating lever 93 will normally be held in such a position that only one contact pair B L-95 will be closed at a time. Thus, the operating lever 63 will be in one of its two positions, or moving from one to the other, which causes the T-lever 63 to be positioned in such a manner as to cause one of the contact points 95 to fulcrum about its associated contact point 65. As a change of selection is made in the operating lever 52, under the control of the flutter lever arrangement, as presently described, the T-lever 53 will be moved from one position to the other, and as the lever 63 is not pivoted about an external point, it will fulcrum about the contact pair which is desired to be closed. In this manner, bounce and vibration will be eliminated.

Fixed to shaft IS, in addition to the cams 34, is a flutter cam 15, which in the present applica tion is provided with seven humps or apices, one for each element of a five-unit code, one for the start interval and one for the stop interval. Cooperating with the periphery of cam T5 is a flutter lever 16 having a cam follower portion "H. Lever 16 is mounted on a pivot 18 and is normally urged clockwise by a spring 19 to cause its follower portion TI to engage the periphery of cam 15. The free extremity of lever '56 is provided with a laterally extending portion 8! which is adapted to cooperate with one or the other of a pair of shoulders 82 and. 83 on respective intermediate members 94 and 85, depending upon the marking (upward) or spacing (downward) position of the rocker member extension 59.

In the embodiment illustrated, the member 84 is slidable between suitable guide rollers 86 and 81, and the member is slidably mounted between guide rollers 81 and 89. A spring 89 functions to urge member 94 rightwardly (Figs. 3, 4, and 5) and to simultaneously impart thereto a tendency to rotate clockwise. Similarly, a spring 9| normally urges the member 85 rightwardly and also tends to impart counterclockwise rotation thereto. In this manner the shoulders 82 and 83 are brought into cooperative engagement selectively with the lateral projection 8| under the control of the rocker member extension 59.

When the flutter cam i5 is rotated, the lutter lever l6 will be vibrated. Then, when the extension 59 is in the upward, or marking position (as shown in Fig. 5) the lever '15 is permitted to engage the shoulder 83 of intermediate member 95, thereby actuating the member 85 leitwardly against the tension of spring 9!. On the other hand, if the extension 59 is in its spacing or downward position (as shown in Fig 4), the lateral projection 8! is permitted to engage the shoulder 82 of the intermediate member 89. Each of the intermediate members 8 5 and 85 is provided with a laterally directed arm 92 and 93, respectively. Arms 92 and 93 are adapted to cooperate with abutments 94 and 95, respectively, of an oscillating member 96 mounted pivotally on a pivot shait 91 suitably positioned between members fi l and 85. Now, if member 84 is actuated leftwardly by the flutter lever 76 (as viewed in Fig. 4) the oscillating member 96 will be rocked to its counterclockwise position. On the other hand, if member 85 is actuated leftwardly (as viewed in Fig. 5), the member 96 will be rocked to its clockwise position.

Oscillating or rocker member 96 is provided with a vertically directed arm 93 which is adapted to be pivotally articulated to the lower extremity of a toggle lever 99 mounted pivotally on the horizontal arm of a detent lever IEH. Clockwise bias is normally imparted to lever lei about a pivot I02 by a spring E63. Substantially intermediate its ends, the toggle 99 engages a notch H34 in the operating lever: 62, as best seen in Fig. 6. This toggle and detent arrangement functions not only as an overcentering means to rapidly shift the contact assembly from marking to spacing and vice versa, but also to maintain the contact mechanism in its shifted position.

A brief description of operation of the arrangement according to the invention will now be given. Having reference to Figs. 1 and 2, upon the operation of a key lever ll, certain ones of the code bars I2 are blocked and others permitted to move in a permutable manner. At the same time, the key lever functions to trip the bail I? in a manner exemplified by said aforementioned patent, whereupon the code bars l2 are permitted to move rightwardly if they are unblocked. Simultaneously, the clutch associated with shaft i6 i released to effect a single rotation of the cams on shaft I6. The levers 28 have assumed the setting of code bars i2 and the interponents 33 are thereby similarly set. The cams 34 actuate the interponents 33 sequentially, which in turn operate to rock the member 39 in a direction depending upon the relative positions between abutments 3536 and 373B. In timed relation to the actuation of member 39 by interponent 33, the flutter cam i5- vibrates the lever E6 to actuate the intermediate members at and 85 according to the position of extension arm 59. Member fit is thereupon rocked by the selective operation of members 84 and 35 to impart oscillation to the toggle 99, which through lever 62 (Fig. 6) acts to rock the contact lever (63 to activate contacts 65-455.

It is to be understood that the above-described arrangement is merely illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

Wha is claimed is:

1. In a transmitter, a signal generator comprising a first rocker member and a second rocker member, a series of sequentially operable cams, an interponent associated with each cam, said interponent disposed between said first rockable member and its associated cam, means for setting said interponents in accordance with a predetermined code, cyclically operable means for operating said cams to actuate said interponents sequentially, whereby said first rockable member is actuated according to the setting of said interponents, flutter cam means, slidable instrumentalities, means carried by said first rocker member and cooperable selectively with said instrumentalities for effecting under the control of said flutter cam means the operation of said second rocker member, transmitting contact means, and means controlled by said second rocker member for controlling the actuation of said transmitting contact means.

2. In a transmitter, a signal generator comprising a, first rocker member and a second rocker member, a series of sequentially operable cams, an interponent associated with each cam, said interponent disposed between said first rocker member and its associated cam, means for setting said interponents in accordanc with a predetermined code, cyclically operable means for operating said cams to actuate said interponents sequentially, whereby said first rocker member is actuated according to the setting of said interponents, a flutter cam, vibrating means controlled by said flutter cam, slidable instrumentalities actuated :by said vibrating means and cooperable selectively with said first rocker member for effecting under the control of said flutter cam the operation of said second rocker member, transmitting contact means, and means controlled by said second rocker member for controlling the actuation of said transmitting contact means.

3. In a transmitter, a plurality of permutation bars, a series of elements for controlling the permutative setting of said permutation bars, a pair of stationary transmitting contacts, a movable member having contact means for engaging with one or the other of said stationary contacts, a first rockable member, a series of sequentially operable cams, an interponent associated with each cam, said interponent disposed between said first rockable member and its associated cam, means for permutably setting said interponents in accordance with the setting of the permutation bars, cyclically operable means for operating said cams to actuate said interponents sequentially, whereby said first rockable member is actuated according to the setting of said interponents, an extension arm on said first rockable member, a pair of slidable instrumentalities operatively associated with said extension arm, said instrumentalities being normally biased toward each other and adapted to be cooperable severally and selectively with said extension arm, confronting shoulders on said instrumentalities, a flutter cam synchronously phased with said sequentially operable cams, a flutter lever operated by said flutter cam, a second rockable member cooperably related to said instrumentalities, toggle means associated with said second rockable member for operating said movable member to activate said contact means.

4. In a transmitter, a signal generator comprising a first rocker means and a second rocker means, sequentially operated means comprising a series of sequentially operable cams and interponents individually associated with said cams for controlling the operation of said first rocker means, selector mechanism for determining the setting of said interponents, transmitting contact means, control means comprising a peripherally fluted cam and a cam follower therefor, movable instrumentalities actuated by said cam follower, and means carried by said first rocker means for selectively conditioning said movable instrumentalities for operation by said control means, whereby said movable instrumentalities are effective upon said second rocker means for controlling the actuation of said transmitting contact means in accordance with the setting of said interponents.

5. In a transmitter, a signal generator comprising a first rocker means and a second rocker means, sequentially operated means comprising a series of sequentially operable cams and interponents individually associated with said cams for controlling the operation of said first rocker means, selector mechanism for determining the setting of said interponents, transmitting contact means, flutter cam means comprising a peripherally fluted cam and a cam follower therefor, reciprocable elements actuated by said cam follower, and means carried by said first rocker means for selectively conditioning said reciprocable elements for operation by said flutter cam means, whereby said reciprocable elements are efiective upon said second rocker means for controlling the actuation of said transmitting contact means in accordance with the setting of said interponents.

6. In a transmitter, a signal generator comprising a first rocker means and a second rocker means, sequentially operated means comprising a series of sequentially operable cams and interponents individually associated with said cams for controlling the operation of said first rocker means, selector mechanism for determining the setting of said interponents, fiutter cam means comprising a peripherally fluted cam and a cam follower therefor, slidable instrumentalities actuated by said cam follower, means carried by said first rocker means and cooperable selectively with said instrumentalities for efiecting under the control of said flutter cam means the operation of said second rocker means in accordance with 8 the setting of said interponents, transmitting contact means, and means controlled by said second rocker means for controlling the actuation of said transmitting contact means.

'7. In a transmitter, signal generating means comprising a first rockable means and a second rockable means, sequentially operated means comprising a serie of sequentially operable cams and interponents individually associated with said cams for controlling the operation of said first rocker means, a selector mechanism for determining the setting of said interponents, a peripherally fluted cam, vibrating means controlled by said cam, slidable instrumentalities actuated by said vibrating means, means carried by said first rockable means for selectively conditioning said slidable instrumentalities in accordance with the setting of said interponents for actuation by said vibrating means to operate said second rockable means correspondingly, transmitting contact means, and toggle means controlled by said second rockable means for controlling the actuation of said transmitting contact means.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,167,528 Salmon July 25, 1939 2,247,162 Beccio June 24, 1941 

